1) For each of the following statements, formulate appropriate null and alternative hypotheses
A college entrance exam company determined that a score of 22 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 150 students who completed this core set of courses results in a mean math score of 22.4 on the college entrance exam with a standard deviation of 3.8. Do...
6.73 Hypotheses. In each of the following situations, state an appropriate null hypothesis H0 and alternative hypothesis Ha. Be sure to identify the parameters that you use to state the hypotheses. (We have not yet learned how to test these hypotheses.) (a) A sociologist asks a large sample of high school students which academic subject they like best. She suspects that a higher percent of males than of females will name economics as their favorite subject. (b) An education researcher...
please show all the steps when answering the questions! 1) State the null and alternative hypotheses for each conjuncture. Indicate whether each is a left tailed right tailed or a two tailed test. a) Last year, the mean monthly rent for an apartment in a certain city was $800. A real estate agent believes that the mean rent is higher this year. b) A mathematics educator believes that the mean number of pages in statistics textbooks is different than the...
Chapter 7 Hypothesis Testing Assignment 1. Write the null hypotheses IN SYMBOLS ONLY of the following alternative hypotheses. a. Hi: u > 9 b. Hi: u<47 c. Hi: u 725 2. Of the alternative hypotheses in the question above, which one(s) would need a two- tailed test? 3. In which type of test would it be easier to reject the null hypothesis, a one-tailed test or a two-tailed test? 4. What does it mean when you fail to reject the...
For the following hypothesis test, determine the null and alternative hypotheses. Also, classify the hypothesis test as two-tailed, left-tailed, or right-tailed. The mean length of imprisonment for motor-vehicle theft offenders in this country is 23.2 months. A hypothesis test is to be performed to determine whether the mean length of imprisonment for motor-vehicle theft offenders in this city differs from the national mean of 23.2 months. Choose the correct null and alternative hypotheses below. O A. Ho:p> 23.2 months Hu=...
a) State the null and alternative hypotheses. Which of the following is correct? A. H0: μ1=μ2; Ha: μ1<μ2 This is the correct answer. B. H0: μ1=μ2; Ha: μ1≠μ2 C. H0: μ1=μ2; Ha: μ1>μ2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was α=_____ What is the P-value? P-value=____ State the researcher's conclusion. Which of the following is correct? A. Fail to reject H0,there is sufficient evidence to conclude that the mean step pulse of...
Question 1 < > 0/3 pts 399 Details Test the claim that the mean GPA of night students is significantly different than 3.4 at the 0.2 significance level. The null and alternative hypothesis would be: Hou = 3.4 H:p > 0.85 H:P < 0.85 H.:u <3.4 H :p = 0.85 H: > 3.4 H1:47 3.4 H :P < 0.85 H :p > 0.85 H : > 3.4 H:P +0.85 H : <3.4 The test is: left-tailed two-tailed right-tailed Based on...
1. Hypothesis Testing - Setup: Suppose you want to test the claim that the mean volume in all 12-ounce cans of Fizzy Pop soda is equal to 12 ounces. In a sample of 120 cans, you find the sample mean is 12.2 ounces. (a) What is the claim? μ < 12 μ > 12 μ = 12 μ = 12.2 (b) What does μ represent? the proportion of all cans with a volume = 12 ounces the mean volume of...
You may need to use the appropriate appendix table or technology to answer this question. Consider the following hypothesis test. H0: μ = 15 Ha: μ ≠ 15 A sample of 50 provided a sample mean of 14.09. The population standard devlation is 3. (a) Find the value of the test statistic. (Round your answer to two decimal places.) (b) Find the p-value. (Round your answer to four decimal places.) (c) At a = 0.05, state your conclusion. Reject H0. There is sufficient evidence to conclude that...
For each of the following scenarios, (1) identify whether it’s observational study or experiment, and (2) identify explanatory variable and response variable. For each of the following scenarios, (1) identify whether it's observational study or experiment, and (2) identify explanatory variable and response variable. Studies conducted in New York City and Boston have noticed that more heart attacks occur in December and January than in all other months. Some people have tried to conclude that overindulgence causes the increased risk...